Tôi đang cố gắng nhận báo cáo từ bảng lịch sử của mình theo giờ sử dụng. history
bảng là;Nhóm MySQL theo giờ
CREATE TABLE IF NOT EXISTS `history` (
`history_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`user_id` int(11) unsigned NOT NULL DEFAULT '0',
`created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`history_id`),
KEY `user_id` (`user_id`),
KEY `created` (`created`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=1 ;
Tôi muốn nhóm bởi HOUR
và COUNT
tất cả các bản ghi trong một phạm vi ngày nhất định.
Hours | Usage
------------------------------------
00:00-01:00 | 5
01:00-02:00 | 9
02:00-03:00 | 0 (or NULL)
03:00-04:00 | 20
...
...
...
22:00-23:00 | 11
23:00-00:00 | 1
Tôi đã sử dụng truy vấn giống như thế này nhưng không hiển thị tất cả các giờ.
SELECT
CASE
WHEN HOUR(created) BETWEEN 0 AND 1 THEN '00:00 - 01:00'
WHEN HOUR(created) BETWEEN 1 AND 2 THEN '01:00 - 02:00'
WHEN HOUR(created) BETWEEN 2 AND 3 THEN '02:00 - 03:00'
WHEN HOUR(created) BETWEEN 3 AND 4 THEN '03:00 - 04:00'
WHEN HOUR(created) BETWEEN 4 AND 5 THEN '04:00 - 05:00'
WHEN HOUR(created) BETWEEN 5 AND 6 THEN '05:00 - 06:00'
WHEN HOUR(created) BETWEEN 6 AND 7 THEN '06:00 - 07:00'
WHEN HOUR(created) BETWEEN 7 AND 8 THEN '07:00 - 08:00'
WHEN HOUR(created) BETWEEN 8 AND 9 THEN '08:00 - 09:00'
WHEN HOUR(created) BETWEEN 9 AND 10 THEN '09:00 - 10:00'
WHEN HOUR(created) BETWEEN 10 AND 11 THEN '10:00 - 11:00'
WHEN HOUR(created) BETWEEN 11 AND 12 THEN '11:00 - 12:00'
WHEN HOUR(created) BETWEEN 12 AND 13 THEN '12:00 - 13:00'
WHEN HOUR(created) BETWEEN 13 AND 14 THEN '13:00 - 14:00'
WHEN HOUR(created) BETWEEN 14 AND 15 THEN '14:00 - 15:00'
WHEN HOUR(created) BETWEEN 15 AND 16 THEN '15:00 - 16:00'
WHEN HOUR(created) BETWEEN 16 AND 17 THEN '16:00 - 17:00'
WHEN HOUR(created) BETWEEN 17 AND 18 THEN '17:00 - 18:00'
WHEN HOUR(created) BETWEEN 18 AND 19 THEN '18:00 - 19:00'
WHEN HOUR(created) BETWEEN 19 AND 20 THEN '19:00 - 20:00'
WHEN HOUR(created) BETWEEN 20 AND 21 THEN '20:00 - 21:00'
WHEN HOUR(created) BETWEEN 21 AND 22 THEN '21:00 - 23:00'
WHEN HOUR(created) BETWEEN 22 AND 23 THEN '22:00 - 23:00'
WHEN HOUR(created) BETWEEN 23 AND 24 THEN '23:00 - 00:00'
END AS `Hours`,
COUNT(*) AS `usage`
FROM history
WHERE (created BETWEEN '2012-02-07' AND NOW())
GROUP BY
CASE
WHEN HOUR(created) BETWEEN 0 AND 1 THEN 1
WHEN HOUR(created) BETWEEN 1 AND 2 THEN 2
WHEN HOUR(created) BETWEEN 2 AND 3 THEN 3
WHEN HOUR(created) BETWEEN 3 AND 4 THEN 4
WHEN HOUR(created) BETWEEN 4 AND 5 THEN 5
WHEN HOUR(created) BETWEEN 5 AND 6 THEN 6
WHEN HOUR(created) BETWEEN 6 AND 7 THEN 7
WHEN HOUR(created) BETWEEN 7 AND 8 THEN 8
WHEN HOUR(created) BETWEEN 8 AND 9 THEN 9
WHEN HOUR(created) BETWEEN 9 AND 10 THEN 10
WHEN HOUR(created) BETWEEN 10 AND 11 THEN 11
WHEN HOUR(created) BETWEEN 11 AND 12 THEN 12
WHEN HOUR(created) BETWEEN 12 AND 13 THEN 13
WHEN HOUR(created) BETWEEN 13 AND 14 THEN 14
WHEN HOUR(created) BETWEEN 14 AND 15 THEN 15
WHEN HOUR(created) BETWEEN 15 AND 16 THEN 16
WHEN HOUR(created) BETWEEN 16 AND 17 THEN 17
WHEN HOUR(created) BETWEEN 17 AND 18 THEN 18
WHEN HOUR(created) BETWEEN 18 AND 19 THEN 19
WHEN HOUR(created) BETWEEN 19 AND 20 THEN 20
WHEN HOUR(created) BETWEEN 20 AND 21 THEN 21
WHEN HOUR(created) BETWEEN 21 AND 22 THEN 22
WHEN HOUR(created) BETWEEN 22 AND 23 THEN 23
WHEN HOUR(created) BETWEEN 23 AND 24 THEN 24
END
Chỉ hiển thị nếu có bất kỳ bản ghi nào.
Hours | Usage
------------------------------------
00:00-01:00 | 5
01:00-02:00 | 9
23:00-00:00 | 1
Tạo bảng tạm thời với tất cả các giờ và bên trái kết hợp với dữ liệu thực tế của bạn. –